Advertisements
Advertisements
प्रश्न
Circumference ‘C’ of a circle is equal to 2π × ______.
Advertisements
उत्तर
Circumference ‘C’ of a circle is equal to 2π × r.
Explanation:
Circumference of a circle = 2π × r
APPEARS IN
संबंधित प्रश्न
In Figure , two concentric circles with centre O, have radii 21cm and 42 cm. If ∠ AOB = 60°, find the area of the shaded region. [use π=22/7]
Find the circumference of the circle with the following radius: (Take `bb(pi = 22/7`)
21 cm
Four cows are tethered at four corners of a square plot of side 50m, so that’ they just cant reach one another. What area will be left ungrazed.
Find the diameter of the circle whose area is equal to the sum of the areas of two circles having radii 4 cm and 3 cm.
In the given figure, APB and AQO are semicircles and AO = OB. If the perimeter of the figure is 40 cm, find the area of the shaded region.
Four equal circles, each of radius a units, touch each other. Show that the area between them is `(6/7"a"^2)` sq units.
A wire bent in the form of an equilateral triangle has an area of 121 `sqrt 3` cm2. If the same wire is bent into the form of a circle , find the area enclosed by the wire.
Find the area enclosed between two concentric cirdes of radii 6.3 cm and 8.4 cm. A third concentric circle is drawn outside the 8.4 cm circle, so that the area enclosed between it and 8.4 cm cirde is the same as that between two inner circles. Find the radii of the third circle correct to two decimal places .
The radius of two circles are in the ratio 3 : 5, find the ratio between their circumferences.
A circle with radius 16 cm is cut into four equal parts and rearranged to form another shape as shown in the following figure:
Does the perimeter change? If it does change, by how much does it increase or decrease?
